.nav-link {
    position: relative;
}

.nav-link::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: -2px;
    width: 0;
    height: 3px;
    background-color: #70304D;
    transition: all 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
    left: 0;
}